In other words, all cannabic vapor can be considered to require an addition of water vapor to compensate - except perhaps while using a self-moisturising butane-operated device where "clean" (soot-less) butane burning generates heat, carbon dioxyde and water vapor only...
ahhh I see now.
On another hand butane cans contain an amount of "impurities" measured in "ppm" (parts-per-million) and those substances come from deep down within the terrestrial crust where petroleum formed in a remote past. Hence the "Plan-B" tag, though with a Bi-Energy (Induction Heating) scenario owners would get to choose between dryness and invisible comet dust. Yet another possibility (for purists) might be to use 2 separate paths: 1 for a pre-heat phase using a very long transit time so the butane-related products never reach the mouthpiece, the other path being exclusively reserved for butane-free cannabis vaporisation by depending only on stored heat (after turning the front puck dim-red).
Additionally, the next method to generate water vapor is by boiling water in an auxiliary vaporizing chamber and that would take me even further into my Lava fantasy!
the issue with this is that regular steam will soak up the heat required for the element to reach the vapourization temp of THC. The only viable option seems to be superheating the steam to the requisite 250o C and that would remove the need for heating the element. At that point the process would essentially become steam distillation.
what I don't understand is why there needs to be additional water vapour added. as your image of the clear tube shows, much of the vapour condenses as the pressure/heat drops so I don't see the evidence to support the notion that adding vapour would make hits smoother. If anything, the evidence suggests that more THC is being left in transit as it binds to the added vapour which condenses quicker due to added mass.